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XYLENE POWER LTD.

FNR MONITORING SYSTEM

By Charles Rhodes, P.Eng., Ph.D.

INTRODUCTION:
Elsewhere on this website Fast Neutron Reactors (FNRs) have been identified as the primary source of energy for meeting mankind's future energy needs. This web page focuses on the design of the FNR's monitoring system.
 

MONITORING SYSTEM OVERVIEW:
The monitoring system is ceiling mounted in the reactor space and looks down toward the top surface of the primary liquid sodium pool. The monitoring system is concerned with the central 12 m diameter of the liquid sodium surface which is directly over the FNR core zone. The monitoring system:
a) Uses a visible light laser scanner to monitor the vertical positions of each of 464 movable fuel bundles;
b) Uses a gamma ray scanner to monitor the gamma ray emission from each of 464 movable fuel bundles;
c) Uses an infrared scanner to monitor the primary liquid sodium discharge temperature of each of 464 movable fuel bundles.

A parameter that it may be worth while to monitor is acoustic activity in the primary sodium pool. Normally the primary sodium flows are laminar and generate little acoustic noise. However, if there is a severe reactor hot spot it will form sodium bubbles that may generate acoustic noise. Another source of acoustic noise will be the primary sodium filter which will likely have a submerged pump.

This web page last updated January 30, 2022.

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